1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
/* Copyright 2022 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Physical fans. These are logically separate from pwm_channels. */
#include "common.h"
#include "compile_time_macros.h"
#include "console.h"
#include "fan_chip.h"
#include "fan.h"
#include "hooks.h"
#include "pwm.h"
#include "timer.h"
#include "thermal.h"
#include "util.h"
#define SENSOR_SOC_FAN_OFF 30
#define SENSOR_SOC_FAN_MID 47
#define SENSOR_SOC_FAN_MAX 53
#define SENSOR_DDR_FAN_TURN_OFF 37
#define SENSOR_DDR_FAN_TURN_ON 38
#define RECORD_TIME (2 * MINUTE)
/* MFT channels. These are logically separate from pwm_channels. */
const struct mft_t mft_channels[] = {
[MFT_CH_0] = {
.module = NPCX_MFT_MODULE_1,
.clk_src = TCKC_LFCLK,
.pwm_id = PWM_CH_FAN,
},
};
BUILD_ASSERT(ARRAY_SIZE(mft_channels) == MFT_CH_COUNT);
static const struct fan_conf fan_conf_0 = {
.flags = FAN_USE_RPM_MODE,
.ch = MFT_CH_0, /* Use MFT id to control fan */
.pgood_gpio = -1,
.enable_gpio = GPIO_EN_PP5000_FAN,
};
static const struct fan_rpm rpm_table[FAN_RPM_TABLE_COUNT] = {
[RPM_TABLE_CPU0] = {
.rpm_min = 2200,
.rpm_start = 2200,
.rpm_max = 3700,
},
[RPM_TABLE_CPU1] = {
.rpm_min = 3700,
.rpm_start = 3700,
.rpm_max = 4000,
},
[RPM_TABLE_DDR] = {
.rpm_min = 4000,
.rpm_start = 4000,
.rpm_max = 4200,
},
[RPM_TABLE_CHARGER] = {
.rpm_min = 4000,
.rpm_start = 4000,
.rpm_max = 4200,
},
[RPM_TABLE_AMBIENT] = {
.rpm_min = 4000,
.rpm_start = 4000,
.rpm_max = 4200,
},
};
struct fan_t fans[FAN_CH_COUNT] = {
[FAN_CH_0] = {
.conf = &fan_conf_0,
.rpm = &rpm_table[RPM_TABLE_CPU0],
},
};
static void fan_get_rpm(int fan)
{
static timestamp_t deadline;
/* Record actual RPM every 2 minutes. */
if (timestamp_expired(deadline, NULL)) {
ccprints("fan actual rpm: %d", fan_get_rpm_actual(FAN_CH(fan)));
deadline.val += RECORD_TIME;
}
}
static void fan_set_percent(int fan, int pct)
{
int new_rpm;
new_rpm = fan_percent_to_rpm(fan, pct);
fan_set_rpm_target(FAN_CH(fan), new_rpm);
fan_get_rpm(fan);
}
void board_override_fan_control(int fan, int *tmp)
{
/*
* Crota's fan speed is control by four sensors.
*
* Sensor charger control the speed when system's temperature
* is too high.
* Other sensors control normal loading's speed.
*
* When sensor charger is triggered, the fan speed is only
* control by sensor charger, avoid heat damage to system.
* When other sensors is triggered, the fan is control
* by other sensors.
*
* Sensor SOC has two slopes for fan speed.
* Sensor DDR also become a fan on/off switch.
*/
static int pct;
int sensor_soc;
int sensor_ddr;
int sensor_charger;
int sensor_ambient;
/* Decide sensor SOC temperature using which slope. */
if (tmp[TEMP_SENSOR_1_SOC] > SENSOR_SOC_FAN_MID) {
thermal_params[TEMP_SENSOR_1_SOC].temp_fan_off =
C_TO_K(SENSOR_SOC_FAN_MID);
thermal_params[TEMP_SENSOR_1_SOC].temp_fan_max =
C_TO_K(SENSOR_SOC_FAN_MAX);
} else {
thermal_params[TEMP_SENSOR_1_SOC].temp_fan_off =
C_TO_K(SENSOR_SOC_FAN_OFF);
thermal_params[TEMP_SENSOR_1_SOC].temp_fan_max =
C_TO_K(SENSOR_SOC_FAN_MID);
}
sensor_soc = thermal_fan_percent(
thermal_params[TEMP_SENSOR_1_SOC].temp_fan_off,
thermal_params[TEMP_SENSOR_1_SOC].temp_fan_max,
C_TO_K(tmp[TEMP_SENSOR_1_SOC]));
sensor_ddr = thermal_fan_percent(
thermal_params[TEMP_SENSOR_2_DDR].temp_fan_off,
thermal_params[TEMP_SENSOR_2_DDR].temp_fan_max,
C_TO_K(tmp[TEMP_SENSOR_2_DDR]));
sensor_charger = thermal_fan_percent(
thermal_params[TEMP_SENSOR_3_CHARGER].temp_fan_off,
thermal_params[TEMP_SENSOR_3_CHARGER].temp_fan_max,
C_TO_K(tmp[TEMP_SENSOR_3_CHARGER]));
sensor_ambient = thermal_fan_percent(
thermal_params[TEMP_SENSOR_4_AMBIENT].temp_fan_off,
thermal_params[TEMP_SENSOR_4_AMBIENT].temp_fan_max,
C_TO_K(tmp[TEMP_SENSOR_4_AMBIENT]));
/*
* Sensor DDR turn on when temperature > 38,
* turn off when temperature < 37
*/
if ((tmp[TEMP_SENSOR_2_DDR]) < SENSOR_DDR_FAN_TURN_OFF) {
pct = 0;
} else if ((tmp[TEMP_SENSOR_2_DDR]) > SENSOR_DDR_FAN_TURN_ON) {
/*
* Decide which sensor was triggered and choose table.
* Priority: charger > soc > ddr > ambient
*/
if (sensor_charger) {
fans[fan].rpm = &rpm_table[RPM_TABLE_CHARGER];
pct = sensor_charger;
} else if (sensor_soc) {
if (tmp[TEMP_SENSOR_1_SOC] > SENSOR_SOC_FAN_MID)
fans[fan].rpm = &rpm_table[RPM_TABLE_CPU1];
else
fans[fan].rpm = &rpm_table[RPM_TABLE_CPU0];
pct = sensor_soc;
} else if (sensor_ddr) {
fans[fan].rpm = &rpm_table[RPM_TABLE_DDR];
pct = sensor_ddr;
} else {
fans[fan].rpm = &rpm_table[RPM_TABLE_AMBIENT];
pct = sensor_ambient;
}
}
/* Transfer percent to rpm. */
fan_set_percent(fan, pct);
}
|
